Book/Report

FZJ-2018-02911

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Vollständiges, spinpolarisiertes Elektronenstreuexperiment an ultradünnen Fe Filmen auf CU$_{3}$Au(001)

Dodt, T. (Corresponding author)FZJ*

1988
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/18494

Report No.: Juel-2223

Abstract: A new apparatus was designed and build up to perform the "complete" low energy electron scattering experiment. In this experiment, a monoenergetic beam of spin polarized electrons is directed onto the surface of a ferromagnetic or nonmagnetic crystal. The intensity and the spin polarization of the scattered electrons were measured as a function of energy for a given scattering angle. The spin-flip- and the spin-nonflip scattering intensities were calculated from the experimental data.First investigations were done on thin Fe films of various thicknesses (fcc Fe(001) for ultrathin films and bcc Fe(001) for thicker films), grown epitaxially on a CU$_{3}$Au(001) single crystal and the substratum itself. In ferromagnetic Fe pronounced structures in the spin-flip intensities were found. These structures, having a maximum at 2eV energy loss, are due to Stoner excitations. In accordance with theoretical predictions, strong differences in the Stoner spectrum of the two phases were found. In addition to the electron energy loss experiments, the dependence of the electron current absorbed by the sample (target current) was measured as afunction of primary electron energy and angle of incidence. In bcc Fe, the measured energy dependence of the spin asymmetry is in very good agreement with earlier predictions in the framework of a dynamical LEED calculation by Tamura et. al..

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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